55400087579 has 4 divisors (see below), whose sum is σ = 55449158760. Its totient is φ = 55351016400.

The previous prime is 55400087513. The next prime is 55400087591. The reversal of 55400087579 is 97578000455.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55400087579 - 2¹⁶ = 55400022043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55400087599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24533897 + ... + 24536154.

It is an arithmetic number, because the mean of its divisors is an integer number (13862289690).

Almost surely, 2^55400087579 is an apocalyptic number.

55400087579 is a deficient number, since it is larger than the sum of its proper divisors (49071181).

55400087579 is a wasteful number, since it uses less digits than its factorization.

55400087579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49071180.

The product of its (nonzero) digits is 1764000, while the sum is 50.

The spelling of 55400087579 in words is "fifty-five billion, four hundred million, eighty-seven thousand, five hundred seventy-nine".